ORLANDO -  The wife of the Orlando nightclub killer reportedly knew he was planning to attack the club and she could be charged. 

There are reports that Omar Mateen's second wife Noor Salman had "some knowledge" that her husband planned something at the Pulse nightclub.

Officials say Salman is cooperating and claims she tried to talk him out of the attack.

Salman could be charged by a grand jury sometime today.

Meanwhile, the FBI is investigating reports Mateen was a "regular" at the gay nightclub and had been leading a secret life as a gay man.